Each moment of the day has its own RGB color in this clock that updates its background with new colors every second.
Nighttime is darker than daytime and every hour has its own hue that varies during the day covering the whole spectrum in 24 hours: blue peaks at midnight, green at 8am and red at 4pm.
What color is it at midnight? A dark blue. What color is it at 4pm? A strong red.
Check out a working website version of this lightweight app at: http://whatcolorisit.sumbioun.com